skip to main content

SciTech ConnectSciTech Connect

Title: Freeze-in through portals

The popular freeze-out paradigm for Dark Matter (DM) production, relies on DM-baryon couplings of the order of the weak interactions. However, different search strategies for DM have failed to provide a conclusive evidence of such (non-gravitational) interactions, while greatly reducing the parameter space of many representative models. This motivates the study of alternative mechanisms for DM genesis. In the freeze-in framework, the DM is slowly populated from the thermal bath while never reaching equilibrium. In this work, we analyse in detail the possibility of producing a frozen-in DM via a mediator particle which acts as a portal. We give analytical estimates of different freeze-in regimes and support them with full numerical analyses, taking into account the proper distribution functions of bath particles. Finally, we constrain the parameter space of generic models by requiring agreement with DM relic abundance observations.
Authors:
 [1] ;  [2] ;  [3]
  1. Department of Theoretical Physics, School of Engineering Sciences, KTH Royal Institute of Technology, Albanova University Center, Stockholm, 106 91 Sweden (Sweden)
  2. Departamento de Física Teórica, Universidad Autónoma de Madrid, Cantoblanco, Madrid, E-28049 (Spain)
  3. Instituto de Física Teórica UAM/CSIC, Calle Nicolás Cabrera 13–15, Cantoblanco, Madrid, E-28049 (Spain)
Publication Date:
OSTI Identifier:
22369831
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 01; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BARYONS; DISTRIBUTION FUNCTIONS; FREEZING OUT; GRAVITATIONAL INTERACTIONS; NONLUMINOUS MATTER; NUMERICAL ANALYSIS; SPACE